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词汇 Distance line
分类 英语词汇 英语翻译词典
释义

Distance line

原声例句
电台实验室

PHIL LAPSLEY: And when a long distance line was idle, when there was no call on it, this tone would be being played continuously.

PHIL LAPSLEY:当长途线路空闲时,当没有呼叫时,这种音调会连续播放。

大商业时代

Professor Pupin's invention has resulted in economies that amount to millions of dollars, and has made possible long distance lines to practically every part of the United States.

Pupin 教授的发明带来了数百万美元的经济效益,并使通往美国几乎每个地区的长途线路成为可能。

英语百科

Distance line

A cave diver running a distance line into the overhead environment to facilitate a safe exit
Plastic general purpose ratchet dive reel with rolled up DSMB attached with bungee loops.
Injection moulded plastic diving spool with 30m of 1.5mm braided line and a double ender bolt snap

A distance line, penetration line or guide line is an item of diving equipment used by scuba divers as a means of returning to a safe starting point in conditions of low visibility, water currents or where pilotage is difficult. They are often used in cave diving and wreck diving where the diver must return to open water after a penetration when it may be difficult to discern the return route. Guidelines are also useful in the event of silt out.

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